diff --git a/frontends/src/primitivus/xmlui.py b/frontends/src/primitivus/xmlui.py
index b549ddd6..d81a2644 100644
--- a/frontends/src/primitivus/xmlui.py
+++ b/frontends/src/primitivus/xmlui.py
@@ -157,7 +157,7 @@ class PrimitivusBoolWidget(xmlui.BoolWidget, urwid.CheckBox, PrimitivusEvents):
         self.set_state(value == "true")
 
     def _xmluiGetValue(self):
-        return "true" if self.get_state() else "false"
+        return C.BOOL_TRUE if self.get_state() else C.BOOL_FALSE
 
 
 class PrimitivusIntWidget(xmlui.IntWidget, sat_widgets.AdvancedEdit, PrimitivusEvents):